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Has anyone bored and replaced the pistons in a 05+ taco?

Discussion in 'Performance and Tuning' started by 07TRDsport, Jul 26, 2007.

  1. Jul 26, 2007 at 5:34 AM
    #1
    07TRDsport

    07TRDsport [OP] Carolina Alliance

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    im curious to see if anyone here has bored out their engine and put bigger pistons in their second gen taco?
     
  2. Aug 6, 2007 at 3:15 PM
    #2
    Lee's06Taco

    Lee's06Taco Well-Known Member

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    No not yet but if you find out let me know how it goes.
     
  3. Aug 6, 2007 at 6:08 PM
    #3
    Panama Red

    Panama Red Well-Known Member

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    1GR-FE 4.0L V6 from a 2007 Toyota Tacoma. The 1GR-FE is the 4.0L version. Bore is 94 mm and stroke is 95 mm. Output is 236 hp (183 kW) at 5200 rpm with 266 lb-ft (382 Nm) of torque at 4000 rpm on 87 octane, and 239 hp at 5200 rpm with 278 lb-ft at 3700 rpm on 91 octane. This engine features Toyota's single VVT-i, variable valve timing, system and a compression ratio of 10.0:1. Inside, the 1GR uses a taper-squish combustion chamber design with matching pistons to improve anti-knocking and engine performance, while also improving intake and fuel efficiency. Toyota adopted a siamese-type intake port, which reduces the surface area of the port walls and prevents fuel from adhering to such walls. This engine has special cast-iron cylinder liners cast into the block, which are a spiny type to improve adhesion between the liner and cylinder block. With these special thin liners it is impossible to bore the block. In the event of cylinder wall damage (scoring, deep protrusions, etc), the entire cylinder block must be replaced. For increased block rigidity, the 1GR also receives a high temperature plastic insulator/protector, which fills the empty space between the outer portion of the cylinders and block material common to open deck engines. For increased cooling efficiency, the 1GR employs water passages between the bores of the engine. There are such 2 passages for each bank for a total of 4. This reduces cylinder hot-spotting and keeps combustion chamber temperatures more uniform.
     
  4. Aug 7, 2007 at 6:02 AM
    #4
    nd

    nd Radical Town. It's a hell of a place!

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    De badged, 5100's, Black Toyota Baja wheels
    yup, read that long time ago when i first got my truck. do you really need anything bigger than a 4.0 though? just max out what you have
     
  5. Aug 7, 2007 at 6:11 AM
    #5
    Panama Red

    Panama Red Well-Known Member

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    ndcouch:
    This in essance makes the 1GR-FE 4.0L engine disposable (or at least the block) since the entire cylinder block must be replaced once it is worn or damaged. This also makes proper break-in and good preventive maintenance even more important (unless you have money to spare to replace your engine).:D
     
  6. Aug 7, 2007 at 6:12 AM
    #6
    Bfmco7

    Bfmco7 Well-Known Member

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    Yeah you cant bore the factory blocks.. It has plenty of power as is. Heck compared to the V8 dakota it has only 4 less horsepower.. I mean what more could you ask for from a stock V6..
     
  7. Aug 7, 2007 at 6:17 AM
    #7
    Panama Red

    Panama Red Well-Known Member

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    Bfmco7:
    And just think, if you use preminum gas, you can close that gap to only 1 HP since you go from 236 hp, 266 lb-ft with regular gas to 239 hp, 278 lb-ft with preminum gas. And that is a lot cheaper than boring a block (power on demand, just add preminum gas).
     
  8. Aug 7, 2007 at 6:30 AM
    #8
    Bfmco7

    Bfmco7 Well-Known Member

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    exactly!! It blows my mind!! i would love to hook a chain to my buddies dakota and my tacoma and see what they well do. has anyone done anything like this yet? If so.. Lets see some video or hear of some results!
     
  9. Aug 7, 2007 at 1:11 PM
    #9
    07TRDsport

    07TRDsport [OP] Carolina Alliance

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    ah alright thanks guys.
     
  10. Aug 9, 2007 at 5:26 AM
    #10
    4x4Taco

    4x4Taco Well-Known Member

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    Yeah...but since its 200lbs lighter its like it has 20 more HP.
     
  11. Aug 9, 2007 at 5:36 AM
    #11
    Bfmco7

    Bfmco7 Well-Known Member

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    You say the tacoma is 200 lbs. lighter also?
     
  12. Aug 9, 2007 at 6:41 AM
    #12
    nd

    nd Radical Town. It's a hell of a place!

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    I havn't checked online but i would agree with 4x4, i would think the tacoma is lighter than the dakota. Sizes are roughly the same but the bigger engine should make it descently heavier.
     
  13. Aug 9, 2007 at 7:57 AM
    #13
    4x4Taco

    4x4Taco Well-Known Member

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    From the specs I have seen the V6 dakota is about 280lbs heavier (curb weight) and the V8 is 400+. Remember that it takes 100 horsepower to make up for 1000lbs in a 1/4 mile race. Or a good rule of thumb is every 100lbs equals 10hp or .01 secs in the 1/4.
     
  14. Aug 9, 2007 at 8:37 AM
    #14
    Bfmco7

    Bfmco7 Well-Known Member

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    So what you are saying is, that in a heads of race the Tacoma should beat the Dakot with no problem at all.
     
  15. Aug 9, 2007 at 10:13 AM
    #15
    4x4Taco

    4x4Taco Well-Known Member

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    Well not exactly...as you all know (well some do I am a hardcore drag racer and have been for many years)...so lets do the math....

    Tacoma 4000lb curb with 200lb driver
    Dakota 4300lb curb with 200lb driver

    Tacoma 200.6 RWHP
    Dakota 221 RWHP (optional 260 HP V8)

    Tacoma expected 1/4 mile... 16.05
    Dakota expected 1/4 mile.... 15.90

    Thats to close to call..will come down to driver/who reacts first/tires etc. but will be a very close race.:rolleyes:
     
  16. Aug 9, 2007 at 10:34 AM
    #16
    Bfmco7

    Bfmco7 Well-Known Member

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    How would you figure it for the 240 horse dakota? It is still so close between the hi po and the tacoma. It is just rediculous that the V6 can come within a tenth and a half of a V8. Your a big racer huh? You race the mustang?


     
  17. Aug 9, 2007 at 10:40 AM
    #17
    4x4Taco

    4x4Taco Well-Known Member

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    Yes...my mustang runs high 9s at around137 MPH. It is still fully street legal. :eek:

    The 240 Dakota would work out to about 16.3
     
  18. Aug 9, 2007 at 11:02 AM
    #18
    Bfmco7

    Bfmco7 Well-Known Member

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    I fugured. Thats a fast car for the street. You have any pictures of it? What track do you normally run out of?
     
  19. Aug 9, 2007 at 11:40 AM
    #19
    4x4Taco

    4x4Taco Well-Known Member

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    I run out of Cayauga or St. Thomas....

    Here is a pic of the Taco killer (LOL) :p
     
  20. Aug 9, 2007 at 6:20 PM
    #20
    07TRDsport

    07TRDsport [OP] Carolina Alliance

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    i always hated those 80's body styles... for some reason i always found them to be an eyesore.. no offense. but i know they can put out some horses.
     
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